“degrees of freedom”的概念、定义、习题解题方法及翻译-数学辞典

单词

degrees of freedom

释义

degrees of freedom

(in statistics) A positive integer normally equal to the number of independent observations in a sample minus the number of population parameters to be estimated from the sample. When the chi‐squared test is applied to a contingency table with h rows and k columns, the number of degrees of freedom equals (h−1)(k−1).

For a number of distributions, the number of degrees of freedom is required to identify which of a family of distributions is to be used. The chi‐squared distribution and t‐distribution each have a single degrees of freedom parameter, and the F‐distribution has two such parameters.

随便看

数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。